ABB ST203M-B32 Industrial Safety Relay Module

ABB ST203M-B32 is a three-pole miniature circuit breaker from ABB’s System pro M Compact family, providing overcurrent protection for three‑phase power feeds in industrial control panels. This B-curve device is rated for 32 A with a 10 kA short‑circuit breaking capacity at a nominal voltage of 240 V AC, making it suitable for standard industrial distribution and motor feeders. The ST203M-B32 is commonly listed under ABB part numbers such as 2CDS273334R0325 or 2CDS273001R0325, and is designed to protect multiple conductors within a single three‑pole unit in ABB’s System pro M Compact modular switchgear ecosystem. Built for reliability in harsh environments, it helps ensure safe shutdown and equipment protection, while aligning with typical industry protection standards for three‑phase installations. This model is part of ABB’s S200/S203M family of MCBs, offering consistent trip characteristics and electrical performance across ABB’s System pro M Compact lineup.